index.js

const { send } = require('micro')
const { get, router } = require('microrouter')
const cors = require('micro-cors')()
const moltinGateway = require('@moltin/sdk').gateway

const moltin = moltinGateway({
  client_id: process.env.MOLTIN_CLIENT_ID,
  client_secret: process.env.MOLTIN_CLIENT_SECRET
})

module.exports = cors(
  router(
    get('/:orderId', async (req, res) => {
      const { orderId } = req.params

      try {
        const {
          json: {
            data: { short_id }
          }
        } = await moltin.Orders.Get(orderId)

        send(res, 200, {
          short_id
        })
      } catch ({ status, json }) {
        send(res, status, json)
      }
    })
  )
)

package.json

{
  "private": true,
  "scripts": {
    "dev": "micro-dev",
    "precommit": "pretty-quick --staged",
    "start": "micro"
  },
  "dependencies": {
    "@moltin/sdk": "github:ynnoj/js-sdk",
    "micro": "^9.1.4",
    "micro-cors": "^0.1.0",
    "microrouter": "^3.1.2"
  },
  "devDependencies": {
    "husky": "^0.14.3",
    "micro-dev": "^2.2.2",
    "prettier": "^1.12.1",
    "pretty-quick": "^1.4.1"
  }
}